Vent assemblies

DETAILED DESCRIPTION The present invention aims to overcome or alleviate one or more of the above disadvantages by providing an improved vent assembly particularly but not exclusively suited to use with igloo type plant nursery buildings which may be readily adapted for use with existing buildings or fitted to buildings during the construction thereof.
The present invention may also be applied to multiple igloo constructions in various attitudes to allow for a desired circulation of air through such buildings.
Other objects and advantages of the invention will become apparent from the following description.
With the above and other objects in view, the present invention resides broadly in a vent assembly for buildings of the type having a roof frame defined by a plurality of spaced apart generally arcuate roof frame means extending between opposite sides of said building, said vent assembly including a pair of side wall portions of generally sawtooth configuration adapted to be secured to respective said roof frame means to extend upwardly therefrom, a top wall portion and a front wall portion of generally upright form and adapted to face to one side of said building and there being provided means for opening said front wall portion whereby to permit passage of air therethrough.
Suitably the side wall portions include respective perimeter frame portions defining the sawtooth profile of the side wall portions and the frame portions are adapted to be secured at opposite ends by bolting or by other fastening arrangement to the roof frame means.
The frame portions are preferably covered with the same fabric material which forms the cover for the roof of the building.
For this purpose, respective connections are provided on the perimeter frame portions to enable the fabric material to be secured thereto.
Suitably the side frame portions are interconnected by a longitudinally extending member fixed to the upper ends of the perimeter frame portions and a further longitudinally extending frame member may be secured to the frame portions at or adjacent their connection to the roof frame means